RETRACTED: Fabrication of stratified nanoporous gold for enhanced biosensing

This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).This article has been retracted at the request of the Author.This paper has been withdrawn at the request of the author as errors have subsequently been found with some of the scientific data. The authors and Publisher would like to apologise for any inconvenience caused.